According to IS : 456-1978, the fiexural strength of concrete is________________?

Related Mcqs:

1. Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is_____________?

   A. M15
   B. M20
   C. M 10
   D. M25

2. If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to__________________?

   A. xv
   B. xc
   C. xv – TC
   D. Tv + Tc

3. According to IS : 456 -1978, the modulus of elasticity of concrete Ec (in N/mm2) can be taken as______________?

   A. Ec = = 5700
   B. Ec = = 570
   C. Ec = = 5700fck
   D. Ec = where fck N/mm2 = 700 is the characteristic strength in

4. Maximum distance between expansion joints in structures as per IS : 456 – 1978 is________________?

   A. 20 m
   B. 30 m
   C. 45 m
   D. 60 m

5. According to IS : 456-1978, the cblumn or the strut is the member whose effective length is greater than________________?

   A. the least lateral dimension
   B. 2 times the least lateral dimension
   C. 3 times the least lateral dimension
   D. 4 times the least lateral dimension

6. According to IS : 456- 1978, minimum slenderness ratio for a short column is_______________?

   A. less than 12
   B. less than 18
   C. between 18 and 24
   D. more than 24

7. According to IS: 456-1978, the maximum reinforcement in a column is_____________?

   A. 2 %
   B. 4%
   C. 6 %
   D. 8 %

8. The design yield stress of steel according to IS: 456-1978 is_______________?

   A. 0.37 fy
   B. 0.57 fy
   C. 0.67 fy
   D. 0.87 fy

   where fy is the characteristic yield strength of steel

9. Modulus of elasticity of steel as per IS : 456-1978 shall be taken as______________?

   A. 20 kN/cm2
   B. 200 kN/cm2
   C. 200kN/mm2
   D. 2xl06N/cm2

10. The strength of concrete after one year as compared to 28 days strength is about_______________?

    A. 10 to 15% more
    B. 15 to 20% more
    C. 20 to 25% more
    D. 25 to 50% more